8331A: Autocal, manual adjustments and speaker placement - Forum

ad1. There is no rules to this. If it's for pleasure and not work, I sometimes relax the GLM filtering for a bit fatter sound.
​​​​​​​If you add new filters or alter existing ones doesn't matter. using less filters to get the same resulting curve might sound better by an esoteric degree.

ad2. your distances sound a bit low, my 8351 are 1,8m apart, my distance from speakers is 1,3m.

ad3. Angle won't do much, drivers aimed at your ears is the game.

I think you should try your absorber symmetrically behind speakers. reflection from wall behind PC screen might be a problem.
​​​​​​​You're firing along the short axis of a very small room, which is very problematic.

I'd try and rearrange things so you look out the window.
​​​​​​​Poor desk might need unplesant interaction with a padsaw.

Thanks for your quick reply. I will try some repositioning of the speakers and relocate the absobers to make them symmetrical behind the monitor.

I already assumed that placing the desk along the short axis would be better regarding acoustics... However, then I would not be able to open the windows anymore. Maybe a new apartment would be the solution.

My desk disagreed with your suggestion to murder it. ;-) As I am also using it when working from home I need the space on it.

Perhaps it's just that our heads' width needs to be accounted for, but I find wider speaker placement better at very near field listening, too.

​​​​​​​The most likely source for a 85-95Hz dip would be cancellation, probably from a hard rear wall, might be near impossible to get rid of it. Still, very much worth it to play around with bass management in GLM, with individual crossover frequencies... I let my desktop 8330's run to 55Hz and start the sub at 70 - it just happens to work well here; My most horrible room dip is about 10 Hz lower.

The sub doesn't filter the mains, no matter how you wire it. If you set bass management to individual mode instead of global (the default), you can select different crossover (high pass and low pass) frequencies for the monitors and sub.

​​​​​​​A global 85 Hz crossover was terrible here, I could pinpoint the sub, so I started lowering the crossover frequency and then experimenting with some overlap... Can't say whether this would do any good or just mess up everything for you, just wanted to point out the option - certainly worth a few tries, GLM is so easy to fool around with.

Yesterday I created different groups in GLM with crossover settings ranging from 50 Hz to 80 Hz, thankfully the subwoofer cannot be localized in any of them. The only difference between all the settings is that lower crossover results in "thinner" overall bass response. But I guess it's always good to at least know the different options and try them out. So thanks for your explanation, I will definetely try out the individual mode.

Dear Hupsi, I would like to propose to use REW. There is a room simulator in it with which you can see the response that you can expect with your room dimensions and relative speaker placement. GLM, as any DSP, cannot work miracles in your room. Your speakers are also fantastic in design, they lower the problems of acoustics in rooms but cannot solve all issues. In the end of the day, you hear the room acoustics.  

In my opinion, see the simulator results, try alternative placement of the speakers and if you can buy a subwoofer to ease the placement of the monitors.